光唇鱼属鱼类一新种

A NEW SPECIES OF THE GENUS Acrossocheilus FROM HUNAN PROVINCE CHINA

本文记述采自湖南吉首的鲤科鱼类１新种，命名为吉首光唇鱼Ａｃｒｏｓｏｃｈｅｉｌｕｓｊｉｓｈｏｕｅｎｓｉｓｓｐ．ｎｏｖ．。新种有以下与同属其他种类相区别的特点：下唇两侧瓣间隙小，几相接触；背鳍末根不分支鳍条柔软不加粗，后缘光滑；背鳍及臀鳍鳍条间膜有黑色条纹；体侧具不规则的大块黑斑或具模糊不清的垂直或纵行条纹等。新种与半刺光唇鱼Ａ．ｈｅｍｉｓｐｉｎｕｓｈｅｍｉｓｐｉｎｕｓ和带半刺光唇鱼Ａ．ｈｅｍｉｓｐｉｎｕｓｃｉｎｃｔｕｓ较为相似。

Acrossocheilus jishouensis ,sp nov (Fig 1) Holotype No 948028, total body length length 105 8 mm, standard body 85 3 mm, collected from Yuanjiang river, Jishou City, Hunan Province, in August 1994 Paratypes 9 specimens, No 948023-948027 & 948029-948032 Totol body length 74-151 mm, standard body length 57—120 mm, data andlocality the same as holotype All type specimens are deposited in Ichthyology Research Section, Biology Department, South China Normal University, Guangzhou D iv-8, A iii-5, P i-15, V i-8, branched caudal fin rays 17 Lateral line scales 405—5 53 5—4-v41,predorsal scales 12-13 circumpeduncular scales 16 External gill rakers on the first gill arch 7-10;inner gill rakers on the first gill arch 12-16 Pharyngeal teeth 2·3·5-5·3·2 Body depth 2 9-3 6 (3 4)in standard body length,head length 3 6-4 (3 8),length of caudal peduncle 5 9-7 (6 5),depth of caudal peduncle 7 6-8 6 (8 3) Snout length 2 6-3 (2 9)in head length,eye diameter 3 9-4 8 (4 4),interorbital width 2 8-3 4 (3 3) Depth of caudal peduncle 1 2-1 5 (1 3) in its length The new species is related to A hemispinus hemispinus and A hemispinus cinctus, but distinguished from them by the following characters:the gap between the two lobes of lower lip is very narrow;the last sample ray of dorsal fin is soft and smooth behind;there are black strikes on the membrance of dorsal and anal fin;there are some large black blotches or indistinct vertical and/or longtudinal strips on body side,or without spots and bands on body side